describe IncomeTax::Countries::UnitedStates::Iowa do
  subject(:result) { IncomeTax::Countries::UnitedStates.new(income: income, income_type: type, tax_year: tax_year, state: 'Iowa') }
  let(:type) { :gross }

  describe "from gross income of 0" do
    let(:tax_year)     { 2015                                      }
    let(:income)       { 0                                         }
    its(:rate)         { should be == Rational(0, 1)               }
    its(:gross_income) { should be == 0                            }
    its(:net_income)   { should be == 0                            }
    its(:taxes)        { should be == 0                            }
  end

  describe "from gross income of 1000" do
    let(:tax_year)     { 2015                                      }
    let(:income)       { 1000                                      }
    its(:rate)         { should be == Rational(10, 97)             }
    its(:gross_income) { should be == 1000                         }
    its(:net_income)   { should be == "896.904".to_d               }
    its(:taxes)        { should be == "103.096".to_d               }
  end

  describe "from gross income of 10000" do
    let(:tax_year)     { 2015                                      }
    let(:income)       { 10000                                     }
    its(:rate)         { should be == Rational(31, 254)            }
    its(:gross_income) { should be == 10000                        }
    its(:net_income)   { should be == "8779.509".to_d              }
    its(:taxes)        { should be == "1220.491".to_d              }
  end

  describe "from gross income of 100000" do
    let(:tax_year)     { 2015                                      }
    let(:income)       { 100000                                    }
    its(:rate)         { should be == Rational(41, 162)            }
    its(:gross_income) { should be == 100000                       }
    its(:net_income)   { should be == "74690.76805".to_d           }
    its(:taxes)        { should be == "25309.23195".to_d           }
  end

  describe "from gross income of 100000000" do
    let(:tax_year)     { 2015                                      }
    let(:income)       { 100000000                                 }
    its(:rate)         { should be == Rational(112, 249)           }
    its(:gross_income) { should be == 100000000                    }
    its(:net_income)   { should be == "55019307.88465".to_d        }
    its(:taxes)        { should be == "44980692.11535".to_d        }
  end

  describe "from net income of 0" do
    let(:type)         { :net                                      }
    let(:tax_year)     { 2015                                      }
    let(:income)       { 0                                         }
    its(:rate)         { should be == Rational(0, 1)               }
    its(:gross_income) { should be == 0                            }
    its(:net_income)   { should be == 0                            }
    its(:taxes)        { should be == 0                            }
  end

  describe "from net income of 1000" do
    let(:type)         { :net                                      }
    let(:tax_year)     { 2015                                      }
    let(:income)       { 1000                                      }
    its(:rate)         { should be == Rational(48, 467)            }
    its(:gross_income) { should be == "1114.567111111111111".to_d  }
    its(:net_income)   { should be == 1000                         }
    its(:taxes)        { should be == "114.567111111111111".to_d   }
  end

  describe "from net income of 10000" do
    let(:type)         { :net                                      }
    let(:tax_year)     { 2015                                      }
    let(:income)       { 10000                                     }
    its(:rate)         { should be == Rational(34, 281)            }
    its(:gross_income) { should be == "11376.6021111111111".to_d   }
    its(:net_income)   { should be == 10000                        }
    its(:taxes)        { should be == "1376.6021111111111".to_d    }
  end

  describe "from net income of 100000" do
    let(:type)         { :net                                      }
    let(:tax_year)     { 2015                                      }
    let(:income)       { 100000                                    }
    its(:rate)         { should be == Rational(84, 325)            }
    its(:gross_income) { should be == "134852.972".to_d            }
    its(:net_income)   { should be == 100000                       }
    its(:taxes)        { should be == "34852.972".to_d             }
  end

  describe "from net income of 100000000" do
    let(:type)         { :net                                      }
    let(:tax_year)     { 2015                                      }
    let(:income)       { 100000000                                 }
    its(:rate)         { should be == Rational(35, 82)             }
    its(:gross_income) { should be == "174465772.164880794".to_d   }
    its(:net_income)   { should be == 100000000                    }
    its(:taxes)        { should be == "74465772.164880794".to_d    }
  end
end
